v2.4.0.6
Document And Entity Information (USD $)
12 Months Ended
Sep. 30, 2012
Document And Entity Information [Abstract]  
Document Type 10-K
Amendment Flag false
Document Period End Date Sep. 30, 2012
Document Fiscal Year Focus 2012
Document Fiscal Period Focus FY
Entity Registrant Name ESCO TECHNOLOGIES INC
Entity Central Index Key 0000866706
Current Fiscal Year End Date --09-30
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 26,649,992
Entity Public Float $ 964,013,283
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes